ack/h/out.h

/*
 * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
 * See the copyright notice in the ACK home directory, in the file "Copyright".
 */
/* $Id$ */

#ifndef __OUT_H_INCLUDED
#define __OUT_H_INCLUDED

#include <stdint.h>

/*
 * output format for ACK assemblers
 */

struct outhead {
	uint16_t oh_magic;	/* magic number */
	uint16_t oh_stamp;	/* version stamp */
	uint16_t oh_flags;	/* several format flags */
	uint16_t oh_nsect;	/* number of outsect structures */
	uint16_t oh_nrelo;	/* number of outrelo structures */
	uint16_t oh_nname;	/* number of outname structures */
	uint32_t oh_nemit;		/* sum of all os_flen */
	uint32_t oh_nchar;		/* size of string area */
};

#define O_MAGIC	0x0202			/* magic number of output file */
#define	O_STAMP	0			/* version stamp */
#define MAXSECT	64			/* Maximum number of sections */

#define	HF_LINK	0x0004			/* unresolved references left */
#define	HF_8086	0x0008			/* os_base specially encoded */

struct outsect {
	uint32_t os_base;		/* startaddress in machine */
	uint32_t os_size;		/* section size in machine */
	uint32_t os_foff;		/* startaddress in file */
	uint32_t os_flen;		/* section size in file */
	uint32_t os_lign;		/* section alignment */
};

struct outrelo {
	uint16_t or_type;		/* type of reference */
	uint16_t or_sect;		/* referencing section */
	uint16_t or_nami;       /* referenced symbol index */
	uint32_t or_addr;		/* referencing address */
};

struct outname {
	union {
	  char	*on_ptr;		/* symbol name (in core) */
	  long	on_off;			/* symbol name (in file) */
	}	on_u;
#define on_mptr	on_u.on_ptr
#define on_foff	on_u.on_off
	uint16_t on_type;		/* symbol type */
	uint16_t on_desc;		/* debug info */
	uint32_t on_valu;		/* symbol value */
};

/*
 * relocation type bits
 */
#define RELSZ	0x0fff			/* relocation length */
#define RELO1	   1			/* 1 byte */
#define RELO2	   2			/* 2 bytes */
#define RELO4	   3			/* 4 bytes */
#define RELOPPC    4            /* PowerPC 26-bit address */
/* relo 5 is unused */
#define RELOVC4    6            /* VideoCore IV address in 32-bit instruction */

#define RELPC	0x2000			/* pc relative */
#define RELBR	0x4000			/* High order byte lowest address. */
#define RELWR	0x8000			/* High order word lowest address. */

/*
 * section type bits and fields
 */
#define S_TYP	0x007F			/* undefined, absolute or relative */
#define S_EXT	0x0080			/* external flag */
#define S_ETC	0x7F00			/* for symbolic debug, bypassing 'as' */

/*
 * S_TYP field values
 */
#define S_UND	0x0000			/* undefined item */
#define S_ABS	0x0001			/* absolute item */
#define S_MIN	0x0002			/* first user section */
#define S_MAX	(S_TYP-1)		/* last user section */
#define S_CRS	S_TYP			/* on_valu is symbol index which contains value */

/*
 * S_ETC field values
 */
#define S_SCT	0x0100			/* section names */
#define S_LIN	0x0200			/* hll source line item */
#define S_FIL	0x0300			/* hll source file item */
#define S_MOD	0x0400			/* ass source file item */
#define S_COM	0x1000			/* Common name. */
#define S_STB	0xe000			/* entries with any of these bits set are
					   reserved for debuggers
					*/

/*
 * structure sizes on disk (bytes in file; add digits in SF_*)
 * Note! These are NOT the sizes in memory (64-bit architectures will have
 * a different layout).
 */
#define SZ_HEAD		20
#define SZ_SECT		20
#define SZ_RELO		10
#define SZ_NAME		12

/*
 * file access macros
 */
#define BADMAGIC(x)	((x).oh_magic!=O_MAGIC)
#define OFF_SECT(x)	SZ_HEAD
#define OFF_EMIT(x)	(OFF_SECT(x) + ((long)(x).oh_nsect * SZ_SECT))
#define OFF_RELO(x)	(OFF_EMIT(x) + (x).oh_nemit)
#define OFF_NAME(x)	(OFF_RELO(x) + ((long)(x).oh_nrelo * SZ_RELO))
#define OFF_CHAR(x)	(OFF_NAME(x) + ((long)(x).oh_nname * SZ_NAME))

#endif /* __OUT_H_INCLUDED */